It is difficult to evaluate the coal seam exploitation geological technology quantitatively which belongs to the qualitative questions.(傳統的評價方法很難對煤層開采地質工藝性這一定性問題進行定量評價。)

Factors affected coal seam permeability change and its law is analyzed.(分析了煤層透氣性變化的影響因素及變化規律。)

From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam.(以哈爾·斯法為例，將相遇折射波法用于剩余煤厚探測中，具有精確、高效、快速的特點。)

The study on coal lithostructures is of great significance for predicting the permeability of coal seam.(煤巖結構的研究在預測煤層的滲透性方面有重要意義。)

Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing.(煤層氣的勘探評價，是開展煤層氣勘探與開發工作的基礎。)

The organization of construction and application result of metal net support in thick coal seam mining are introduced.(介紹了厚煤層回采巷道中錨網(索)支護的施工組織及應用效果分析。)

The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.(構造作用是控制井田范圍內煤層厚度變化的主要地質因素。)

Due to the coal seam particularity in Shendong Coal Mine, cracks appear at the radial seat of Eickoff SL500 shearer.(由于神東礦區煤層的特殊性，在使用艾柯夫公司SL500型采煤機時，搖臂座出現了裂縫。)

So it is feasible used the logging data to forecast coal seam gas content, and the applied value is enhance further.(證明用測井資料預測煤層瓦斯含量是可行的，從而進一步加強了測井資料的實際應用價值。)

The average coal seam here is three feet thick.(這里的煤層平均為3英尺厚。)